Ventilating fan



1. Ventilating fan

1.1 is a front, right perspective view.

1.2 is a front, left perspective view.

1.3 is a top view.

1.4 is a right side view.

1.5 is a front view.

1.6 is a left side view.

1.7 is a rear view.

The broken lines in the drawings illustrate portions of the ventilating fan and form no part of the claimed design. 

CLAIM The ornamental design for a ventilating fan, as shown and described. 